I usually check the steering box every couple of years or so when I do my Spring checkup on the car and to loosen/tighten the big 41mm locknut on the front of the box I had been using a plumber's, sink drain, adjustable wrench from the el Cheapo Asian aisle at Home Depot.
It worked, but that's about it and I have always wanted just a big, honkin', 41mm open end wrench (or even an English equivalent) but pricing them out on-line showed them to be $35 bucks or more so I passed.
I found this on Amazon for under $8 bucks!
It fits without modification (read that "No grinding the heck out of it to make it fit") and it can be used with a 3/8" ratchet or 3/8" foot-long breaker bar.
Now, I am no longer jealous of Danny P and his 41mm steering box wrench.
Plus, it fits in my tool chest easier than Danny's